CN105020445B - A kind of high pressure gas safety valve - Google Patents
A kind of high pressure gas safety valve Download PDFInfo
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- CN105020445B CN105020445B CN201510320606.8A CN201510320606A CN105020445B CN 105020445 B CN105020445 B CN 105020445B CN 201510320606 A CN201510320606 A CN 201510320606A CN 105020445 B CN105020445 B CN 105020445B
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- 238000007789 sealing Methods 0.000 claims abstract description 32
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 18
- 239000010959 steel Substances 0.000 claims abstract description 18
- 239000007769 metal material Substances 0.000 claims abstract description 5
- 239000004642 Polyimide Substances 0.000 claims description 5
- 229920001721 polyimide Polymers 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 4
- 239000007789 gas Substances 0.000 description 17
- 239000001307 helium Substances 0.000 description 6
- 229910052734 helium Inorganic materials 0.000 description 6
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 6
- 238000000227 grinding Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
- F16K17/06—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with special arrangements for adjusting the opening pressure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
- F16K17/0406—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded in the form of balls
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/164—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side and remaining closed after return of the normal pressure
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Safety Valves (AREA)
- Taps Or Cocks (AREA)
Abstract
本发明提供一种高压气体安全阀，包括，阀芯，安装在安全阀壳体中，具有与高压气体系统连接的阀芯通道，气体压力经阀芯通道输送至阀芯出口，阀芯出口具有非金属材质的锥面；钢球，设置在支座的第一端上，可与锥面配合；弹簧，设置在支座与固定连接在安全阀壳体上的弹簧支座之间，提供弹簧力在设定压力以下使钢球与锥面配合形成密封。本发明利用阀芯的非金属锥面与钢球配合实现密封，达到良好的密封效果。
The invention provides a high-pressure gas safety valve, which includes a valve core installed in a safety valve housing and having a valve core channel connected to a high-pressure gas system, the gas pressure is delivered to the valve core outlet through the valve core channel, and the valve core outlet has Conical surface made of non-metallic material; steel ball, set on the first end of the support, which can cooperate with the conical surface; spring, set between the support and the spring support fixedly connected to the safety valve housing, providing spring The force is below the set pressure to make the steel ball cooperate with the cone to form a seal. The invention utilizes the non-metallic tapered surface of the valve core to cooperate with the steel ball to realize the sealing and achieve good sealing effect.
Description
技术领域technical field
本发明涉及气体压力系统安全阀领域，特别是涉及一种高压气体安全阀。The invention relates to the field of gas pressure system safety valves, in particular to a high-pressure gas safety valve.
背景技术Background technique
安全阀是压力系统广泛使用的安全装置。当压力系统内的介质压力超过规定值时，安全阀自动开启。当介质压力降低到一定值时，安全阀回座并自动关闭。Safety valves are widely used safety devices in pressure systems. When the medium pressure in the pressure system exceeds the specified value, the safety valve will automatically open. When the medium pressure drops to a certain value, the safety valve returns to its seat and closes automatically.
直接作用式安全阀基本上分弹簧式和重锤式两种类型。目前应用最为广泛的是弹簧式安全阀，工作状态时，它通过弹簧提供密封力，保证设备正常运行。当压力升高时，介质压力克服弹簧力使阀门开启，系统压力下降，当压力下降到一定值时，阀门在弹簧力的作用下回座。Direct acting safety valves are basically divided into two types: spring type and heavy hammer type. At present, the most widely used is the spring safety valve, which provides sealing force through the spring in the working state to ensure the normal operation of the equipment. When the pressure rises, the medium pressure overcomes the spring force to open the valve, and the system pressure drops. When the pressure drops to a certain value, the valve returns to its seat under the action of the spring force.
伺服高压氦气源可用于伺服系统的初级能源，为防止减压阀下游气体压力异常升高，在减压阀的出口管路上设置了高压气体安全阀。当减压阀出口压力异常升高至31MPa时，安全阀打开对减压阀下游进行压力泄放，保证下游产品安全。The servo high-pressure helium source can be used as the primary energy source of the servo system. In order to prevent the abnormal increase of the gas pressure downstream of the pressure reducing valve, a high-pressure gas safety valve is installed on the outlet pipeline of the pressure reducing valve. When the outlet pressure of the pressure reducing valve rises abnormally to 31MPa, the safety valve opens to release the pressure downstream of the pressure reducing valve to ensure the safety of downstream products.
传统安全阀的密封一般采用端面密封形式，为了保证阀芯阀座可靠密封，对阀芯阀座的加工形位公差有很高的要求，通常零件加工完成后还要进行多次配磨才可能保证密封性。The sealing of traditional safety valves generally adopts the form of end face sealing. In order to ensure the reliable sealing of the valve core and seat, there are high requirements for the processing shape and position tolerance of the valve core and seat. Usually, after the parts are processed, it is necessary to carry out multiple grindings. Guaranteed tightness.
发明内容Contents of the invention
本发明要解决的技术问题为：提供一种高压气体安全阀，解决现有技术的高压气体安全阀对阀芯阀座的加工形位公差有很高的要求，需要多次配磨，若配磨不合适则容易产生可靠性不足的问题。The technical problem to be solved by the present invention is: to provide a high-pressure gas safety valve to solve the problem that the high-pressure gas safety valve in the prior art has high requirements on the processing shape and position tolerance of the valve core and seat, and needs to be milled many times. If the grinding is not suitable, it is easy to cause the problem of insufficient reliability.
本发明的技术方案为：Technical scheme of the present invention is:
一种高压气体安全阀，包括，阀芯，安装在安全阀壳体中，具有与高压气体系统连接的阀芯通道，气体压力经阀芯通道输送至阀芯出口，阀芯出口具有非金属材质的锥面；钢球，设置在支座的第一端上，可与锥面配合形成密封；弹簧，设置在支座与固定连接在安全阀壳体上的弹簧支座之间，提供弹簧力在设定压力以下使钢球与锥面配合形成密封。A high-pressure gas safety valve, comprising: a valve core installed in a safety valve housing and having a valve core channel connected to a high-pressure gas system; the gas pressure is delivered to the valve core outlet through the valve core channel; the valve core outlet is made of non-metallic material The cone surface; the steel ball is set on the first end of the support, which can cooperate with the cone surface to form a seal; the spring is set between the support and the spring support fixedly connected to the safety valve housing to provide spring force Below the set pressure, the steel ball is matched with the taper surface to form a seal.
进一步地，阀芯与安全阀壳体采用分体式结构，阀芯与阀芯的非金属锥面采用滚压成型。Furthermore, the valve core and the safety valve housing adopt a split structure, and the valve core and the non-metallic tapered surface of the valve core are formed by rolling.
进一步地，弹簧支座由锁紧螺母锁紧并封闭、固定在安全阀壳体之内。Further, the spring support is locked, closed and fixed in the safety valve casing by the locking nut.
进一步地，弹簧支座和锁紧螺母采用线接触抵接。Further, the spring support and the lock nut are abutted by line contact.
进一步地，还包括，密封圈，设置在阀芯与安全阀壳体的内壁之间。Further, it also includes a sealing ring arranged between the valve core and the inner wall of the safety valve housing.
进一步地，非金属材料为聚酰亚胺。Further, the non-metallic material is polyimide.
本发明与现有技术相比的优点在于：本发明利用阀芯的非金属锥面与钢球配合实现密封，达到良好的密封效果。Compared with the prior art, the present invention has the advantages that: the present invention utilizes the non-metallic tapered surface of the valve core to cooperate with the steel ball to realize the sealing and achieve good sealing effect.
附图说明Description of drawings
图1示出了本发明的高压气体安全阀的剖视图；Fig. 1 shows the cross-sectional view of the high-pressure gas safety valve of the present invention;
图2示出了本发明的高压气体安全阀的密封面局部放大图。Fig. 2 shows a partially enlarged view of the sealing surface of the high-pressure gas safety valve of the present invention.
附图标记说明：1、安全阀壳体；2、弹簧；3、调节螺母；4、锁紧螺母；5、挡圈；6、弹簧支座；7、支座；8、阀芯；9、钢球；10、密封圈A；11、密封圈B。Explanation of reference signs: 1, safety valve housing; 2, spring; 3, adjusting nut; 4, lock nut; 5, retaining ring; 6, spring support; 7, support; 8, spool; 9, Steel ball; 10, sealing ring A; 11, sealing ring B.
具体实施方式Detailed ways
本发明的目的在于提供一种伺服系统氦气源系统中所用的高压气体安全阀。该安全阀密封形式采用分体式结构，并采用非金属锥面与钢球接触面密封。The purpose of the present invention is to provide a high-pressure gas safety valve used in the helium source system of the servo system. The sealing form of the safety valve adopts a split structure, and is sealed by a non-metallic cone surface and a steel ball contact surface.
高压气体安全阀是针对冷气挤压式伺服系统氦气源而特别研制的，开启压力为31MPa。针对高压氦气源用安全阀的工作特点，本发明确定了弹簧式安全阀的技术方案。安全阀设计的关键是密封面设计，另外调节机构设计也比较重要。本发明的安全阀的工作介质为氦气，氦气分子小，密封较为困难，因此，安全阀确定合适的密封方案至关重要。另外，由于安全阀开启压力较高，调试安全阀弹簧支座承受的轴向力就较大，有必要对调节机构进行优化设计。The high-pressure gas safety valve is specially developed for the helium source of the cold air squeeze servo system, and the opening pressure is 31MPa. Aiming at the working characteristics of the safety valve for high-pressure helium gas source, the invention determines the technical proposal of the spring-type safety valve. The key to the design of the safety valve is the design of the sealing surface, and the design of the regulating mechanism is also important. The working medium of the safety valve of the present invention is helium gas, whose molecules are small and difficult to seal. Therefore, it is very important to determine a suitable sealing scheme for the safety valve. In addition, due to the high opening pressure of the safety valve, the axial force borne by the spring support of the safety valve during debugging is relatively large, so it is necessary to optimize the design of the adjustment mechanism.
本发明的特征具体阐述如下：Features of the present invention are specifically set forth as follows:
1)阀芯采用分体式结构，利用非金属锥面与钢球配合。非金属锥面材料例如为聚酰亚胺，聚酰亚胺具有良好的力学、耐磨性能，该种材料的强度较高，比较适用于高压气体的密封，本发明可利用聚酰亚胺锥面与钢球实现配合密封。1) The valve core adopts a split structure, using a non-metallic cone surface to cooperate with a steel ball. The non-metallic cone surface material is for example polyimide, polyimide has good mechanics, wear resistance, the intensity of this kind of material is higher, is more suitable for the sealing of high-pressure gas, the present invention can utilize polyimide cone The surface and the steel ball realize the cooperation and sealing.
安全阀的密封性在很大程度上取决于阀门的结构设计。安全阀密封件的材料应具有与氦气良好的相容性、抗压性、良好的机械加工性和良好的弹性变形能力。不考虑制造装配环节造成的误差，正常工作状态的安全阀的泄漏和密封面上的比压低有直接关系。为了降低安全阀的泄漏量，我们在安全阀的密封设计方面采取：阀芯为分体式结构，阀芯与阀芯非金属锥面采用滚压成型，在加工时在非金属材质上形成倒角，利用阀芯的非金属锥面与钢球实现密封。这种密封形式利用非金属锥面受压后的微小变形保证密封面的紧密贴合，进而达到良好的密封效果。本发明的阀芯金属部分与安全阀壳体采用分体式结构，采用分体结构有利用提高零件的机加工艺性，另外也有利用提高阀芯金属部分的加工精度，保证产品可靠密封。The tightness of the safety valve depends largely on the structural design of the valve. The material of the safety valve seal should have good compatibility with helium, pressure resistance, good machinability and good elastic deformation ability. Regardless of the error caused by the manufacturing and assembly process, the leakage of the safety valve in normal working condition is directly related to the specific pressure drop on the sealing surface. In order to reduce the leakage of the safety valve, we adopt the sealing design of the safety valve: the valve core is a split structure, the valve core and the non-metallic cone surface of the valve core are formed by rolling, and chamfers are formed on the non-metallic material during processing , use the non-metallic cone surface of the spool and the steel ball to achieve sealing. This sealing form utilizes the slight deformation of the non-metallic cone surface after being pressed to ensure the tight fit of the sealing surface, thereby achieving a good sealing effect. The metal part of the spool and the safety valve housing of the present invention adopt a split structure, which can improve the machining processability of the parts, and also improve the processing accuracy of the metal part of the spool to ensure reliable sealing of the product.
2)调节机构优化2) Optimization of the adjustment mechanism
安全阀开启压力高，弹簧刚度较大，调节机构如仍采用传统的端面接触调节将增加调试难度，且容易造成弹簧座的磨损，影响调试精度，因此本发明安全阀的弹簧支座和调节螺母接触面之间采用线接触抵接(例如将弹簧支座接触面制成弧形锥面，调节螺母制成平锥面，二者之间即为线接触)，这样就大大减少了安全阀调节时，弹簧支座所受到的摩擦力，可以方便的实现对安全阀的压力调节。The opening pressure of the safety valve is high, and the spring stiffness is relatively large. If the adjustment mechanism still adopts the traditional end-face contact adjustment, it will increase the difficulty of debugging, and it will easily cause the wear of the spring seat, which will affect the accuracy of debugging. Therefore, the spring support and the adjustment nut of the safety valve of the present invention The contact surfaces are abutted by line contact (for example, the contact surface of the spring support is made into an arc-shaped cone surface, and the adjustment nut is made into a flat cone surface, and the line contact between the two), which greatly reduces the adjustment of the safety valve. , the friction force on the spring support can easily realize the pressure adjustment of the safety valve.
安全阀结构图见图1、图2所示。当系统气源压力低于31MPa，阀芯(8)上的非金属锥面与钢球(9)紧密贴合，来保证密封；当系统气源压力大于等于31MPa，在气压力作用下推动钢球(9)克服弹簧(2)的弹力的作用向右运动(图中方向)，利用阀芯(8)和钢球(9)之间的缝隙对气源压力进行泄压。The structural diagram of the safety valve is shown in Figure 1 and Figure 2. When the system air source pressure is lower than 31MPa, the non-metallic tapered surface on the valve core (8) fits closely with the steel ball (9) to ensure sealing; when the system air source pressure is greater than or equal to 31MPa, the steel ball is pushed The ball (9) overcomes the effect of the elastic force of the spring (2) to move to the right (direction in the figure), and utilizes the gap between the valve core (8) and the steel ball (9) to release the pressure of the air source.
本发明安全阀的结构包括，安全阀壳体(1)，构成安全阀的外壳；安全阀壳体(1)内部具有空腔，一端设置阀芯(8)，阀芯(8)中的管道与压力系统连接，阀芯(8)通道输送气体压力至阀芯(8)出口；阀芯(8)出口处具有非金属锥面，该非金属锥面与钢球(9)配合；钢球(9)设置在支座(7)的第一端上；支座(7)的第二端上连接弹簧(2)；弹簧(2)的第一端抵靠连接弹簧支座(6)；弹簧支座(6)的第二端连接调节螺母(3)；调节螺母(3)由锁紧螺母(4)锁紧并封闭、固定在安全阀壳体(1)之内。通过旋转调节螺母(3)可以起到对弹簧的调节作用。此外，作为密封各个组件的目的，还有挡圈(5)，密封圈A(10)，密封圈B(11)等作为密封件。挡圈(5)和密封圈A(10)设置在安全阀壳体(1)外周壁的槽中，密封圈B(11)设置在阀芯(7)与安全阀壳体(1)内壁之间。The structure of the safety valve of the present invention includes a safety valve housing (1), which constitutes the outer casing of the safety valve; the safety valve housing (1) has a cavity inside, and a valve core (8) is arranged at one end, and the pipeline in the valve core (8) Connected with the pressure system, the channel of the spool (8) delivers the gas pressure to the outlet of the spool (8); the outlet of the spool (8) has a non-metallic cone surface, and the non-metallic cone surface cooperates with the steel ball (9); the steel ball (9) be arranged on the first end of support (7); connect spring (2) on the second end of support (7); the first end of spring (2) leans against and connects spring support (6); The second end of the spring support (6) is connected with the adjusting nut (3); the adjusting nut (3) is locked and closed by the locking nut (4), and is fixed in the safety valve housing (1). The spring can be adjusted by rotating the adjusting nut (3). In addition, for the purpose of sealing each component, there are retaining ring (5), sealing ring A (10), sealing ring B (11) etc. as sealing members. The retaining ring (5) and sealing ring A (10) are set in the groove of the outer peripheral wall of the safety valve housing (1), and the sealing ring B (11) is set between the valve core (7) and the inner wall of the safety valve housing (1). between.
以上所述仅为本发明的一个具体实施例。但本发明的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本发明揭露的技术范围内，可容易想到的变化或替换，都应涵盖在本发明的保护范围之内。The above is only a specific embodiment of the present invention. However, the protection scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention shall be covered by the protection scope of the present invention.
Claims (5)
- A kind of 1. high pressure gas safety valve, it is characterised in that including,Spool (8), in safe valve chest (1), has the valve core channel being connected with High-Pressure Gas System, gas pressure warp The valve core channel is delivered to cartridge outlet, and the cartridge outlet has the conical surface of non-metallic material；Steel ball (9), is arranged in the first end of bearing (7), can be formed and sealed with the cone match；Spring (2), is arranged on the bearing (7) between the spring fastening (6) that is fixedly connected on safe valve chest (1), carries Make the steel ball (9) and the cone match below setting pressure for spring force, the spring fastening (6) and adjusting nut it Between using line contact abut, i.e., the arc conical surface is made in spring fastening contact surface, the flat conical surface is made in adjusting nut.
- 2. high pressure gas safety valve according to claim 1, it is characterised in that the spool (8) is adopted with safe valve chest With split structure, the spool (8) and the nonmetallic conical surface of the spool (8) use roll forming.
- 3. high pressure gas safety valve according to claim 1, it is characterised in that the spring fastening(6) locked and closed by locking nut (4), be fixed within safe valve chest (1).
- 4. high pressure gas safety valve according to claim 1, it is characterised in that further include, sealing ring (11), is arranged on institute Between the inner wall for stating spool (8) and the safe valve chest (1).
- 5. high pressure gas safety valve according to claim 1, it is characterised in that the nonmetallic materials are polyimides.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510320606.8A CN105020445B (en) | 2015-06-11 | 2015-06-11 | A kind of high pressure gas safety valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510320606.8A CN105020445B (en) | 2015-06-11 | 2015-06-11 | A kind of high pressure gas safety valve |
Publications (2)
| Publication Number | Publication Date |
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| CN105020445A CN105020445A (en) | 2015-11-04 |
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| CN105972276B (en) * | 2016-08-07 | 2018-11-27 | 西安航空学院 | A kind of exhaust pressure relief safety valve |
| CN106402443A (en) * | 2016-11-02 | 2017-02-15 | 北京宇航系统工程研究所 | Safety valve provided with automatic inflation and deflation device |
| CN110985576B (en) * | 2019-12-24 | 2021-05-28 | 上海交通大学 | Rigid force control device based on non-rigid connection |
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| CN201322120Y (en) * | 2008-12-11 | 2009-10-07 | 中国航天科技集团公司烽火机械厂 | high-pressure large-flow inflated safety valve |
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| JPH0571651A (en) * | 1991-09-11 | 1993-03-23 | Nichiwa Sangyo Kk | Depressure valve gear |
| CN202040350U (en) * | 2011-03-29 | 2011-11-16 | 芜湖德孚转向系统有限公司 | Valve core assembly |
| CN202100783U (en) * | 2011-05-25 | 2012-01-04 | 上海浦东汉威阀门有限公司 | Safety relief valve |
| CN102434691A (en) * | 2011-08-31 | 2012-05-02 | 常州天泰矿山设备制造有限公司 | Ultrahigh-pressure safety valve |
| CN204140969U (en) * | 2014-09-24 | 2015-02-04 | 广东华液动力科技有限公司 | One-way valve |
| CN104455581A (en) * | 2014-11-28 | 2015-03-25 | 四川航空工业川西机器有限责任公司 | Ultrahigh pressure check valve |
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| CN201322120Y (en) * | 2008-12-11 | 2009-10-07 | 中国航天科技集团公司烽火机械厂 | high-pressure large-flow inflated safety valve |
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